Here you can find the source of toLong(String value)
public static long toLong(String value)
//package com.java2s; /**/*from w ww.jav a2s . c o m*/ * * Copyright (c) 2015 Fannie Mae, All rights reserved. * This program and the accompany materials are made available under * the terms of the Fannie Mae Open Source Licensing Project available * at https://github.com/FannieMaeOpenSource/ezPie/wiki/License * * ezPIE? is a registered trademark of Fannie Mae * */ public class Main { public static long toLong(String value) { return toLong(value, 0L); } public static long toLong(String value, long defaultValue) { if (isNullOrEmpty(value)) return defaultValue; try { return Long.parseLong(value.trim()); } catch (NumberFormatException ex) { return defaultValue; } } public static boolean isNullOrEmpty(String value) { return (value == null) || value.isEmpty(); } }